Fact: The United States was not even fighting in Vietnam when the war was lost. When the US left Vietnam, the Paris Peace Accords had been signed, and the war was over.
- US combat troops left Vietnam after North Vietnam agreed to end all hostilities and signed the Paris Peace Accords in 1973.
- South Vietnam succumbed in April, 1975, after North Vietnam had repeatedly violated the terms of the Paris Peace Accords.
- South Vietnam lost the war because the US Congress abandoned them, passing the Foreign Assistance Act that withdrew almost all support from South Vietnam.
- South Vietnam still managed to hang on for two years, until the North Vietnamese, heavily supplied by China and Russia, overwhelmed their undersupplied armies.